Refillable electric fuse



G. H. DRABENSIOTT.

REFILLABLE ELECTRIC FUSE.

APPLICATION FILED IIEC. I3, 1920. 1,429,938. PatentedSept. 26, 1922.

Patented Sept. 2e, 1922.

GLENN H. DRABENESTOTT, vF' WOOSTER, OHIO.

REFILLABLE iinnornio rusia.

Application filed 'December 13, 1.920. Serial Eo, 430,58

, following is a specification.

My invention relates to improvements in electric fuses, and particularly to such as are reillable, and its principal objects are, first, to provide a `fuse of such character as to be iillable wit-hout' the use of tools; and,

secondly, to provide a re-fillable fuse con` s'tructed of one piece, the parts of which need not `be separated in order to refill the same by inserting a new fuse link therein, in lieu of one that has been burnt out; and, lastly, to provide a re-lillable electric fuse of such construction as to be handierand less expensive, and more perfect than fuses of like character heretofore made.

My invention consists primarily in the construction of a re-fillable fuse in such manner that its parts may be assembled readily, and, whenso assembled, need not be taken apart in order to change the fuse link therein, but may remain as a single piece, adapted to be opened and shut by the rotary action of an enveloping sheath, having a slot therein, adapted to register with a corresponding' slot in the body of the fuse, when said sheath is rotated a predetermined dist-ance; and, secondly, of improved means for inserting and connecting the fuse link within the body of the fuse, and for exchanging an injured or burnt out fuse link without the use of tools.

My invention is illustrated by the accom-` panying' drawing, in which similar letters and figures `of reference indicate like parts.

Referring thereto, Fig. 1 is a perspective view of a re-illable electric fuse embodyingmy invention, one end thereof being removed for better illustration of the partsthe two ends thereof being in all respects alike. Fig. 2 is a vertical longitudinal cross section of Fig. l on the dotted line 2-2 thereof, showing; the relation of the several parts to each other. Fig. 3 is a side view of a fuse link, such as I employ, for insertion within the body of the fuse; and Fig. i is a detail view of the block and end piece for insertion at veach end thereof.

In the drawing, A is the outer sheath and B the fuse body, the former having` a longitudinal slot opening,- G from end 'to end thereof, and the latter, a like slot opening II, said slot openings being` adapted to register longitudinally with each other by the rotation of the sheath ri. upon the body B. D is a block or end piece which isadapted to be inserted, one at each .end of the body B, and be secured therein by means of a set-screw j, or equivalent means. end is bifurcated, the parts c and being partly separated by a. cavity o therein, shown in 4,. n

Ein endcap E covers each end of the fuse. being preferably secured thereto by means of the 'threaded tlnnnbscrew bolt I, as best shown in 2. Said bolts extend vertically througrh the end caps and the body Iiadjacent thereto, and Vare threaded into the adjacent part e of the block D, and terminate with a swivel cap or disk t' located intermediate the parts e and ,f of the block.

L Il are flat members solidly connected to` the blocks l) respectively, such as are commonly used in fuses., and no claim speciflcally is made thereto. The fuse link F, having thin flat ends g g, is also old, except in the manner of connecting` it with the blocks at each end of the body of" the fuse. It is readily inserted endwise and flatwise between the swivel disks i t' and the abutinents f y, respectively, by simply rotating' the outer sheath A around. the body B until the slot openings G II, respectively, are opposite each other, the ends of thefuse link dropping by gravity into the cavity b (Fig. d), when it may be clamped therein by the thumbscrews I I, respectively, and then in closed completely within the fuse by rotating` said sheath to normal position, shown in Fig. l. Said sheath is preferably held removably in normal closgd position by means of a resilient member located in the exterior `portion of the body I?, its central part being raised and adapted to removably enter within the hollow of a raised portion Z in a corresponding, part of the sheath, best shown in Fig. 2.

Heretofore, fuse links of similar form have been inserted within the body by removing` an outer covering of said body, and clamping the ends thereof upon the inner Its inner4 end of the extended flat member L, and securing the said parts together by means of `screws or the like, access to which has been given by the removal of the outer covering of the body, and such I do not broadly claim. My improvement lies in the construction and organization of the related parts in such manner that the outer covering need not be removed, and in means tor the removal or attachment oit the it'use link, whereby screw drivers and other tools inay be dispensed With in the operation, and the ends oi the iluse link better secured by the means a'loresaid, which atlord larger surface bearings, and better opportunity for 'functioning the fuse.

Having' thus ilully described ny invention, what l claizn as neiv and desire to secure by Letters Patent l. ln a device ol' the character described, the combination with a cylindrical body, having; longitudinal slot opening` therein, of a cylindrical sheath envelopin@` said body, said sheatlis having; a longitudinal slot opening therein adapted to r u'ster With said body slot by rotation over said body; lii'lfurcated blocks in the ends of said body, respectively., and Ineens, includingscrews passed troni Without said sheath through one oit the abutnients oit said blocks, respectively, for fastening; the parts together, and a fuse linlr inserted edsgeivise into notches in said blocks, respectively, substantially as set forth.

2. In a re-illable fuse, the combination With a cylindrical body having a longitudinal slot opening therein, of a cylindrical sheath enveloping said body, and having a longitudinal slot opening therein adapted to register With said body slot by rotation thereover, means lor removablyv securingsaid cylindrical bodies in closed position when rotated, biturcated head-blocks in the ends ot said body, respectively, caps mounted over the ends of said bodies, respectively; an electric 'fuse link lit-ted to drop by gravity through said slots, its ends resting in cavities ot said head-blocks, when said cylindrical body slots are in juxtaposition; and means, including` manually operable screws passed through said end caps, body ends, and adjacent abutments of said head-blocks, respectively, for connecting the ends of said :fuse link, respectively, thereto and to said flat extensions 'from said blocks, respectively, substantially as set forth, and 'for the purpose speciiied.

ln Witness whereof, I hereunto set my hand this 9 day of October A. D. 1920.

GLENN H. DRABENSTOTT.

In presence of tivo Witnesses:

HIRAM B. SWARTZ, CHARLES C. JONES. 

